Metallic reenforcement for concrete



Mar. 27, 1923. 1,449,855

H. J. FOSTER METALLIC REENFORCEMENT FOR CONCRETE Patented Mar, 27, i923.

entre STATES PATENT FFEQE.

HENRY J'. FOSTER, 0F CLEVELAND, OHIO, ASSIGNOR TO HYDRAULIC PRESSED STEE CDTi/ITAM, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

:METALLIC REENFORCEIiIENT FOR CONCRETE.

Application filed April 13, 1920. Serial No. 373,616.

To all whom lt may concern Be it known that I, HENRY J. FOSTER, a citizen of the United States, residing at Cleveland, in the. county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Metallic Reenforcements for Concrete, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates generally to metallic reenforcements for concrete columns and girders, and more-particularly to the novel construction of spacer` intended for use in connection with a helically coiled rod or wire for the purpose of properly positioning said helix and at the same time rendering the reinforcing element stronger. The

invention is also in the nature of an improvement upon the spacer disclosed in the application of myself and John Burkhardt, iiled April 9, 1920, Serial No. 372,403, the object being to provide for the quicker and easier securing of the coiled rod to the spacer and also to provide a firmer and more binding or locking engagement between the parts.

llith these and certain other objects which will become apparent as the description proceeds, the invention consists in the novelties of construction and manipulation hereinafter set Vforth and pointed out in the appended claims.

In the drawings forming a part of this specification, Fig. 1 is a view of a part of the blank from which the spacer is made; Fig. 2 is a detail perspective view showing a portion of the spacer after the same has been folded; Fig. 3 is a face view of the same after the rod has been connected thereto; and Fig. t is a side view of the same.

In carrying out my improvement, I employ a strip of sheet metal A which may be of any desired length and width andany suitable gauge, and the opposite edges of this strip are notched or slotted as shown at B providing `oppositely disposed pairs of prongs C. The notches are preferably cut at oblique angles as shown and the inner ends are in transverse alignment, and the ends of the prongs C are also in transversel alignment as most clearly shown in Fig. l. When the strip is folded longitudinally the notches will extend in reverse direction but their inner ends will always be in transverse alignment and the ends of the prongs C will also remain in transverse alignment. The shape and relative position of the notches is such lthat a coil D of the khelical rod can be inserted obliquely yinto a pair of notches and when brought around to a position perpendicular to the axis of the strip said rod will be placed beneath the oppositely projecting prongs C.

The helically coiled rod readily permits the individual coils to be separately placed in the series of notches and the inherent resilency of the coil immediately brings each coil from an oblique (introducing) position to a transverse (seating) position and in order to quickly and easily lock the coil in said seat I bend each pair of prongs toward each other and across and over the rod as most clearly shown in Fig. 3, and this bending of the prongs though easily accomplished serves to bind or lock the rod securely in the seats at the ends of the notches thereby providing a secure connection between the spacer and helically coiled rod. The spacer being made of thin sheet metal materially reduces the cost of production of the reinforcing element as a whole, and by virtue of the fold or longitudinalbend therein great rigidity and strength is imparted to said spacer which perceptibly increases the facility with which the unit can be handled in setting up.

` It will be understood that any desired number of spacers can be used in connection with a single helical coil.

Having thus described my invention, what I claim is l. A spacer for spiral reenforcements comprising a folded strip of metal the edges of said strip having pairs of oppositely projecting prongs beneath which a rod can be inserted, said prongs being bendable towards each other to lock said rod in engagement with said edges.

2. A spacer for spiral reenforcements comprising a longitudinally folded strip of sheet metal the edgesthereof being notched and having opposed pairs of oppositely pro- -iecting prongs beneath which a rod can be inserted, said prongs being bendable towards each other to lock said rod in engagement with said folded strip.

3. A spacer for spiral reenforcements comprising a folded strip of metal, the edges of said strip having reversely inclined notches, the inner ends of said notches being in transverse alignment, and providing oppositely disposed prongs also in transverse alignment, the ends of said prongs being bendable toward the longitudinal center of said bar.

4. A spacer for spiral reenforcements comprising a folded strip of metal, the edges or' said strip having oppositely projecting prongs adapted to engage opposite sides of a rod inserted beneath said prongs, said prongs being bendable towards each other across said rod, to lock the saine in engagement with said spacer.

5. A metallic reenforcement comprising a 11A/rasee lielicall;7 coiled rod, and a spacer strip having` spaced Wings, said Wings bang notched to provide seats 'for the coils of said rod, the projecting edge portions of said wings being bent toward the longitudinal center of said bar and across said rod.

6. A metallic reenforcement comprising a helically coiled rod, and a longitudinally folded sheet metal strip, the edges thereof boinc' oppositel5lv slotted, providing` opposed pairs oi' prongs, beneath which the coils of the rod are seated, said prongs being bent inwardl;T toward each other to lock said coil in its seat.

In testimony whereof, l hereunto my signature.

HENRY J. FOSTER., 

